Coil form mounting



Nov. 29, 1949 F. WOOD I COIL FORM MOUNTING Filed Aprfil 26, 1946 FRANKW000 mvsuron.

H/s Arron/vs).

Patented Nov. 29, 1949 COIL FORM MOUNTING Frank Wood, Elmhurst, 111.,assignor to Zenith Radio Corporation, a corporation of IllinoisApplication April 26, 1946, Serial No. 665,049

6 Claims.

The present invention pertains in general to coil form mountings and inparticular to an improved mounting arrangement wherein a coil formmounting member is formed as an integral part of a radio receiverchassis or the like.

In the past, coil forms, such as those used in radio receivers, havegenerally been mounted by means of twist or spade lugs which are rivetedto the coil form and pass through openings in the chassis to which thecoil form is secured by twisting the lugs or threading nuts thereon. Itis an object of the present invention to pro- .vide an improved mountingarrangement which eliminates the need for attaching lugs or the like tothe coil form, whereby more economical manufacture of apparatusemploying such coil forms is obtained through elimination of certainmanufacturing operations and reduction of coil form spoilage occurringtherein.

A further object ofthe invention is to provide an improved arrangementfor securing a coil form to a chassis of sheet material without the needfor any securing means which extends through the chassis, wherebygreater freedom in mounting parts on the side of the chassis oppositethe coil form is obtained.

The features of the present invention which are believed to be novel areset forth with particularity in the appended claims. The presentinvention itself, both as to its organization and manner of operation,together with further objects and advantages thereof, may best beunderstood by reference to the following description taken in connectionwith the accompanying drawing in which:

Figures 1, 2 and 3 disclose one method of forming a mounting member, orlug, from a chassis of sheet material in accordance with one embodimentof the invention,

Figure 4 is a perspective view of a coil form mounted by means of themember, or lug, disclosed in Figures 1 to 3,

Figures 5 and 6 are elevational views of coil forms mounted inaccordance with modifications of the invention,

Figures 7 and 8 disclose an alternative form of mounting member,

Figures 9 and 10 disclose side and elevational views, respectively, of afurther modification of the invention, and

Figure 11 discloses an alternative form of the mounting membersdisclosed in the preceding figures.

In the embodiment of the invention illustrated in Figure 4 there isshown a portion of a chassis I of sheet metal or the like, from which amounting member, or lug, 2 has been formed perpendicular and parallel tothe plane of the chassis. The parallel portion of the lug 2 extendsthrough opposed slots in a tubular coil form 3. The openings arepreferably diagonally opposed whenthe coil form is cylindrical. The freeend of lug I is formed overto engage the coil form-3,-thereby securingit firmly in place.

It is preferred that the mounting lug 2 be formed from a sheet metalchassis in order to simplify manufacturing operations and to obtain theutmost economy in manufacture. Figure} discloses an outline which isdie-cut in a sheet metal chassis I. The die is preferably arranged alsoto form the cut away portion along the dotted lines of Figure 1 into theshape disclosed in Figures 2 and 3. Coil form 3 is passed ovelj theportion of lug 2 whichis parallel to the chassis l until the coil formengages a shoulder formed near the fixed end of the lug 2, asillustrated in Figure 4. The free end of lug 2 is then formedperpendicular to the plane of the chassis I in order to prevent movementof coil form 3 relative thereto. The free end of the lug 2 preferablyhas a weakened neck portion 4 formed therein so that it may readily beformed over without damage to the coil form.

.While chassis for radio receivers and the like are generally mad-e ofsheet metal, the invention is not limited to the use of such material.For example, the chassis may be molded of a phenolic resin in'which casemounting members, such as 2, may be molded therein. When the mountingmembers are formed of material which is not ductile a dab of cement orthe' like may be ap plied to the tip thereof, after the coil form hasbeen placed thereover, rather than bending the tip of the mountingmember. V

The cantilever portion of the mounting member need not be parallel tothe chassis. In Figure 5 there is shown a section of a supporting sheetor chassis, 5 having a mounting member 6 formed therefrom, which memberis formed closer to the chassis 5 at the free end of the member than atthe fixed end thereof. A coil form I, having diagonally opposed openingstherein which are spaced at different distances from one end thereof, isplaced over the cantiliver portion of member 6 by springing the latteraway from the chassis. After the coil form has been placed over themounting member, it is allowed to spring back in place to press thelower end of coil form I firmly against the chassis 5. The slope ofmember B may be relied on to prevent movement 01,

3 coil form 1 relative thereto, or, if desired, a dab of cement 8 or thelike may be applied to the tip of member 6.

In Figure 6 there is shown a section of supporting sheet, or chassis, 9having a mounting member 10 formed therefrom, which member is formedfarther from the sheet 9 at the free end of the member than at the fixedend thereof. This arrangement is-,desirable since it: allows a, collform ll to be-placed over the cantilever portion of the mounting memberwith the greatest of, ease. The tip of member ID is subsequently formedupwardly to engage one side oiiformllv and thereby secure it firmly inplace.

In some instances it is not"permissible-to have" openings in a radioreceiver chassis. In such cases a mounting member,sueh;as-.-that=,disclosed; in Figures '7 and 8, may be employed in, lieuof that previously described. The mountinglug' 12'' is formed in a shapesimilar to that disclosed in the preceding figures but has a portion 7formed parallel to'achassis I3, and adjacent thereto, at the fixedfi endot thes lug. l2. Thisportion of the -lug I2 is preferably attachedv tothe chassis Baby spot welds;

Radi'o receiver chassis usually have-several fiat portions formed:perpendicularly to eachother. Itiswthereiore possible tov form amounting lug from one of a pair of perpendicuiar flat portions,

or walls; inorder to securea coil form to the other oneof thefiatportions; or walls. Such an arrangement h-as been illustrated in Figures#9 and lo' whereinamounting lug l5--is-formedfrom a sidewall of achassis lfi parallel to a,-- horizontal portion'-ofi 'such chassis. A-coil form ['1 is secured, with one end thereof in abutment withthehorizontalportionof the chassis-l6; in-the same'manner as describedheretofore.

' In Figure 1 1- a-modified formioi the-mounting lugspreviouslydescribed hasbeen shown; In this-modification the entire tipendof' th'elug has been reduced-inwidth rather than merely provid-inganarrow constricted portion near the tip; In the appendedclaims it isin-tendedj'th'at the-term neck-portion apply-to either of the forms" of'tip-disclosed herein;

While particular embodiments of the present invention have been shownand'described; it ,will be obvious to thoseskilled in the art thatchanges and-modifications may be made withoutv departing from thisinvention in its broader aspects, andltherefore', the aim" in theappended-claims is to cover all such'changesandmodificationsasf all"within the ;true spirit and: scope a of this invention.

I'claimt" I-. Incombination, a metallic sheet, atub'ular coil formhaving one end abutting said sheet, said form havingopposedfopeningstherein spaced, at equal distances from said'one end, and av memberextending ironrsaid; sheet and haVing a, portion extendingparallehthereto, said member having -asheulder formed therein at thefixedfend of the parallel portion and having a neck portion formedtherein at the free end of the parallel portion, the parallel portion ofsaid member extending through said openings with said shoulder engagingone side of said form and having said neck portion formed over to engagethe opposite side of said form.

2. In combination, a supporting sheet, a tubular coil form having oneendgabutting said-sheet, said form having openings therein-- spaced fromsaid one end, and a member extending from said sheet and having acantilever portion, said member havingsanshoulder formed therein at thefixed end of the cantilever portion and having a Weak- M enedsection atthefree end of the cantilever portion, the cantilever portion of saidmember extending through said openings with said shoulder engagingeoneside of said form and having said weakened section formed over to engagethe opposite side of said form.

3. In -combination, a supporting sheet, a tubular coil form having oneend abutting said sheet, said form having opposed openings thereinspaced at equal distances from said one end, and a member formed fromsaid sheet and having a portion extending parallel thereto, the parallelportion of said memberextending through said openings to firmly securethe form to said sheet.

4; In combination, a supportingsheet, a tubular coil form having one endabutting said sheet, said form having openings therein spaced from saidoneend, and a member-formed 'from' said sheet and having a cantileverportion extending through said openings to firmly secure the form tosaid sheet.

5. In combination, a supporting sheet, a tubular coil form havingone-end abutting, said sheet, said form having openings therein spacedfrom said one end, andamember extending from said sheet and having acantilever portion extending through said openings tofirmly secure theform to said sheet.

6. Incombination, a supporting sheet, a tubular coilforin having oneendabutting said sheet, a member extending from said sheetand having a.cantilever, portion extending through said coil form, and meansat thefree end of the cantilever portion for preventing movement oilsaid coilform relative to said member.

FRANK WOOD.

REFERENCES" CITED The following referencesare of,-record in the

